What does rachis mean?

Definitions for rachis
ˈreɪ kɪs; ˈræk ɪˌdiz, ˈreɪ kɪ-rachis

This dictionary definitions page includes all the possible meanings, example usage and translations of the word rachis.

Princeton's WordNet

  1. rachisnoun

    axis of a compound leaf or compound inflorescence

  2. spinal column, vertebral column, spine, backbone, back, rachisnoun

    the series of vertebrae forming the axis of the skeleton and protecting the spinal cord

    "the fall broke his back"


  1. rachisnoun

    The main shaft of either a compound leaf, head of grain, or fern frond.

  2. rachisnoun

    The spine or the vertebrae of the spine.

  3. rachisnoun

    The central shaft of a feather.


  1. Rachis

    In biology, a rachis (from the Ancient Greek: ῥάχις [rhákhis], "backbone, spine") is a main axis or "shaft".


  1. rachis

    Rachis is a term used in biology to refer to the main stem or axis of a plant or animal structure, from which other parts such as branches, leaves, or feathers extend or grow. It can refer to the main shaft of an inflorescence in plants, spine in vertebrates, or central shaft in feathers of birds. It is essentially the "backbone" of a structure in botanical, zoological, or ornithological context.

Webster Dictionary

  1. Rachisnoun

    the spine; the vertebral column

  2. Rachisnoun

    same as Rhachis

  3. Etymology: [NL., fr. Gr. "ra`chis, -ios.]


  1. Rachis

    Rachis is a biological term for a main axis or "shaft".

Chambers 20th Century Dictionary

  1. Rachis

    rā′kis, n. the spine: (bot.) a branch or axis of inflorescence which proceeds in nearly a straight line from the base to the apex:—pl. Rā′chidēs.—n. Rāchial′gia, pain in the spine.—adjs. Rāchial′gic; Rāchid′ial, Rāchid′ian.—n. Rāchil′la, a secondary rachis in a compound inflorescence.—adj. Rāchit′ic, rickety.—ns. Rāchī′tis, rickets in children (see Rickets): (bot.) a disease which produces abortion in the fruit; Rāch′itome, an anatomical instrument for opening the spinal canal. [Gr. rachis, the spine.]


  1. Rachis

    a ridge or keel dividing the spinning canal at base, in caterpillars; the shank of an antennal joint into which the lateral spines or other processes are inserted.

Matched Categories

Anagrams for rachis »

  1. Sirach

  2. chairs

How to pronounce rachis?

How to say rachis in sign language?


  1. Chaldean Numerology

    The numerical value of rachis in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of rachis in Pythagorean Numerology is: 4

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"rachis." Definitions.net. STANDS4 LLC, 2024. Web. 28 May 2024. <https://www.definitions.net/definition/rachis>.

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    a state of irritation or annoyance
    A lucubrate
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